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M-Series Model MG Transmitter with Digital Output Level Plus
®

Liquid-Level Sensors
With Temposonics
®
Technology
M-Series Model MG Transmitter
Digital Output
Product Specification
SENS
O
RS
®
550784 F
Product overview
The M-Series Model MG transmitter satisfies the demand for a digital
communication interface in the Liquid Level marketplace for vessels
from 20 inches to 60 feet.
Outputs for the Model MG include Modbus, F
OUNDATION
fieldbus,
and DDA (a proprietary ASCII protocol). Modbus and DDA outputs
are communicated via a 4-wire multi-drop power and data bus (EIA
485), whereas F
OUNDATION
fieldbus has a specified 3-wire bus.
Utilizing the bus networks eliminates the requirements for individual
cable runs from each tank and these three data formats provide a
direct interface to most types of computers and digital communica-
tion equipment.
The Model MG provides 3-in-1 sensing through one process opening
of the product level, the interface level, and temperature. The Modbus
and F
OUNDATION
fieldbus output also allow the user to measure
volume from a 100 point strap table with the option for temperature
correction. Once the transmitter is installed and calibrated there is
no requirement for scheduled maintenance or recalibration. Set it
and forget it!
FeatureS
Modbus and F

„
OuNDatION
fieldbus Output
3-in-1 Measurement

„

Product

Interface

temperature
100 point strap table

„
No Scheduled Maintenance or recalibration

„
aPI temperature Corrected Volumes

„
Non-linearity 0.008% F.S.

„
aPPlICatIONS
Custody transfer

„
Inventory Control

„
Bulk Storage

„
Sanitary Process Control

„
MarketS
Petroleum/Petrochemical

„
Propane terminals

„
Biotech / Pharmaceuticals

„
Food and Beverage

„
Water and Wastewater

„
NeMa type 4X enclosure
Sanitary transmitter
Single Chamber Housing
rigid transmitter
Dual Chamber Housing
Flexible transmitter
All specifications are subject to change. Contact MTS for specifications and
engineering drawings that are critical to your application. Drawings contained
in this document are for reference only. Go to www.mtssensors.com for the
latest support documentation. M-Series Model MR Liquid-Level Transmitter, Digital Output - Product Specification, 550784 F
MTS Sensors
2
Product specifications
Parameters
Specifications
leVel OutPut
Measured
variable:
Product level and interface level
Output:
Modbus RTU, DDA or F
OUNDATION

fieldbus
Full range:
Flexible transmitter:
3050 mm (120 in.) to
18288 mm (720 in.) §
rigid transmitter:
508 mm (20 in.) to
7620 mm (300 in.) §
Sanitary transmitter:
508 mm (20 in.) to
7620 mm (300 in.) §
Non-linearity:
0.008% F.S. or 1.46 mm (1/16 in.)*
Hysteresis:
0.002% F.S. or 0.366 mm (0.01 in.)*
(any direction)
resolution:
Up to 0.025 mm (0.001 in.)
time constant:
1-3 second (typical)
teMPerature OutPut
Measured
variable:
Average and multi-point temperature
Up to 12 Modbus
Up to 5, DDA and F
OUNDATION
fieldbus
temperature
range:
-40 °C (-40 °F) to 105 °C (221 °F)
temperature
accuracy:
±0.28 °C (±0.5 °F)
Computed
variables
(Modbus and
F
OUNDATION

fieldbus):
Gross volume (mass)
Net volume (alarms)
eleCtrONICS
Input voltage
range:
Modbus and DDa:
10.5 to 30.1 Vdc, 28 Vdc maximum for I.S.
ATEX approval
F
OUNDATION
fieldbus:
9 to 32 Vdc bus powered
reverse polarity
protection:
Series diode
lightning/
transient
protection:
Stage 1: line-to-ground surge suppres-
sors; IEC 61000-4-5
Stage 2: line-to-line and line-to-ground
transient suppressors; IEC 61000-4-4
Safety approvals:
Modbus and DDa
FM/CSa: Explosion-proof
Class I, Groups B, C and D
Class II, Groups E, F and G
Division 1, NEMA Type 4X
Models: Explosion-proof housing req.
FM/CSa: Intrinsically safe
Class I, Groups A, B, C and D
Class II, Groups E, F and G
Division I, NEMA Type 4X
Division 2, Non-Incendive
ateX: Intrinsically safe EEx ia IIA & IIB T4
(con tact factory for model numbers).
Parameters
Specifications
Safety approvals
F
OUNDATION

fieldbus:
FM/CSa: Explosion-proof
Class I, Groups B, C and D
Class II, Groups E, F and G
Division 1, NEMA Type 4X
Models: Explosion-proof housing required
FM/CSa: Intrinsically safe pending
ateX: Intrinsically safe pending
CalIBratION
Zero adjust
range:
Anywhere within the active length, No field
adjustment is required
Span adjust
range:
Full scale 152 mm (6 in.) from zero
eNVIrONMeNtal
Sealing:
O-Ring sealed for outdoor use
(NEMA Type 4X)
Humidity:
0 to 100% relative humidity
Operating
temperatures:
electronics:
-40 °C (-40 °F) to 71 °C (160 °F)
Sensing element:
-40 °C (-40 °F) to 125 °C (257 °F)
temperature element:
-40 °C (-40 °F) to 105 °C (221 °F)
Vessel pressure:
Dependent on float pressure rating (18.7
bar (275 psi) max. - flexible outer pipe)
Materials
(wetted parts):
Wetted parts: 316L stainless steel
Non-wetted parts: 316L SS, Epoxy coated
aluminum
FIelD INStallatION
length
(excluding
housing):
508 mm (20 in.) to 18288 m (720 ft.)
Housing
dimensions:
Single chamber enclosure:
127 mm (5 in.) by 123 mm (4.84 in.). 119
mm (4.70 in.) O.D.
Dual chamber enclosure:
127 mm (5 in.) by 177 mm (6.95 in.). 109
mm (4.28 in.) O.D.
NeMa type 4X enclosure:
81 mm (3.2 in.) by 123 mm (4.85 in.)
Mounting:
rigid pipe: 3/4 in. NPT adjustable fitting
Flexible pipe: 1 in. NPT adjustable fitting
Wiring:
Modbus or DDa
4-wire connections + earth ground/tank
ground, 1/2 in. NPT conduit opening
NEMA Type 4X, 3/4 in.NPT (Ex housing)
Wiring:
F
OuNDatION

Fieldbus
3-wire Type A fieldbus cable 1/2 in. NPT
conduit opening NEMA Type 4X,
3/4 in.NPT explosion-proof housing
Notes:
* Whichever is greater
** Must specify at time of order, not on all units.
Contact factory for other materials.
Contact factory for longer lengths.
Length dependent. Contact factory for higher temperatures.
Contact factory for higher pressures.
§ Flexible sensing elements come standard with flexible pipes. Rigid sensing
elements come standard with rigid pipes. A flexible sensing element is optional
for a rigid pipe configuration.
Minimum length of 2032 mm (80 in.) for 12 temperature positions. All
specifications are subject to change, contact MTS for specifications critical to
your needs. M-Series Model MG Liquid-Level Transmitter, Digital Output - Product Specification, 550784 F
MTS Sensors
3
typical installation and mounting, rigid pipe
Illustrated below are three typical product installation and mounting methods for rigid pipe applications. For information about typical floating
roof and typical cone roof installation methods see page 6.
rIgID traNSMItter PIPe INStallatION aND MOuNtINg reFereNCeS
Riser
3/4 in. NPT fitting
Tip of transmitter
Tank flange
(provided by customer)
95 mm (3.75 in.)
Minimum height
127 mm
(5 in.)
210 mm
(8.25 in.) max.
121 mm
(4.75 in.) O.D.
Threaded 3/4 in. NPT
compression fitting, male
Tank flange
Outer pipe
16 mm
(0.625 in.)
O.D.
Level 1 Float
95 mm (3.75 in.)
Sensor Inactive
Zone
316L SS
74 mm (2.9 in.)
Welded
RF flange
165 mm
(6.5 in.)
Level 2 Float
(Order Separately)
Tip of Transmitter
(Order Separately)
DT Custom Positions
Modbus
DDA & F.F.
12
11
10
9
8
7
6
5
4
3
2
1
5
4
3
2
1
Order length
508 mm (20 in.) to
7620 mm (300 in.)
Teflon,
6100 mm (240 in.) max.
traNSMItter INaCtIVe ZONe: 316l SS, 74 MM (2.9 IN.)
Notes:
Drawings are for reference only.
1.
Contact factory for engineering drawings.
2.
Application worksheets are available at www.mtssensors.com.
3.
74 mm (2.9 in.) min.
Inactive zone
3/4 in. NPT
Adjustable fitting
Tip of transmitter
Tank flange
(provided by customer)
Order length
95 mm (3.75 in.)
minimum
Pipe diameter
16 mm (0.625 in.) M-Series Model MR Liquid-Level Transmitter, Digital Output - Product Specification, 550784 F
MTS Sensors
4
typical installation and mounting, sanitary pipe
Illustrated below are three typical product installation and mounting methods for sanitary pipe applications. For information about typical
floating roof and typical cone roof installation methods see page 6.
SaNItary PIPe INStallatION aND MOuNtINg reFereNCeS
Tip of transmitter
Sanitary process connection,
sanitary cap
(welded to sensor pipe)
Sanitary clamp
(customer supplied)
Mating process connection
(customer supplied)
Sanitary float
(permanently mounted on
some pipe styles)
Top view
Riser
123 mm
(4.85 in.)
81 mm
(3.19 in.)
152 mm
(6 in.)
Customer supplied cable
(15 ft.) connected to
terminal strip
Sanitary Process
Connection (Sanitary Cap)
Sensor Inactive
Zone
See Table
XP Housing
63.5 mm (2.5 in.)
NEMA Housing
48 mm (1.9 in.)
Level 1 Float
(Order Separat